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Note 6 - Warrants Outstanding (Details) - shares | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Warrant Issued for Financing and Stock Subscriptions [Member] |  |
Warrants Outstanding (in shares) | 2,100,000 | 2,100,000
Warrants Issued to Consultants [Member] |  |
Warrants Outstanding (in shares) | 350,000 | 100,000
Warrants Issued to a Major Stockholder and Chairman [Member] |  |
Warrants Outstanding (in shares) | 953,367 | 953,367
Warrants Outstanding (in shares) | 3,403,367 | 3,153,367

X
- Definition The total number of warrants of an entity issued. + References No definition available. + Details
Name: | atrn_ClassOfWarrantsOrRightsIssued
Namespace Prefix: | atrn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=atrn_WarrantIssuedForFinancingAndStockSubscriptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=atrn_WarrantsIssuedToConsultantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=atrn_WarrantsIssuedToAMajorStockholderAndChairmanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |